add terminal window size update

3 files changed, 36 insertions, 0 deletions

diff --git a/src/line/cursor.cc b/src/line/cursor.cc
index 02e43cf..538dfca 100644
--- a/src/line/cursor.cc
+++ b/src/line/cursor.cc
@@ -21,6 +21,8 @@ namespace ov4
 
 void print_override(const std::string &s)
 {
+    check_window_update();
+    
     // save current cursor position
     // print("\x1b[s"); fflush(stdout);
     // WTF
@@ -43,6 +45,8 @@ void print_override(const std::string &s)
 
 void move_cursor(char c)
 {
+    check_window_update();
+
     switch (c)
     {
         case 'A':
@@ -64,6 +68,8 @@ void move_cursor(char c)
 
 void cursor_input_char(char c)
 {
+    check_window_update();
+
     // if receives any input
     // it should move to the latest history
     history_index = get_last_index();
@@ -97,6 +103,8 @@ void update_window_size()
 
 void move_cursor(T_cursor_movement_direction d)
 {
+    void check_window_update();
+
     switch (d)
     {
         case T_cursor_movement_direction::LEFT:
@@ -159,6 +167,8 @@ void move_cursor(T_cursor_movement_direction d)
 
 void switch_history(T_cursor_movement_direction d)
 {
+    check_window_update();
+
     switch (d)
     {
         case T_cursor_movement_direction::UP:
@@ -209,4 +219,14 @@ void cursor_skip_prompt()
     print("\r\x1b[{}C", prompt_pos-1); fflush(stdout);
 }
 
+void check_window_update()
+{
+    if (windows_size_changed)
+    {
+        update_window_size();
+        clear_below();
+        windows_size_changed = false;
+    }
+}
+
 }
diff --git a/src/line/mode.cc b/src/line/mode.cc
index 06f1727..208465b 100644
--- a/src/line/mode.cc
+++ b/src/line/mode.cc
@@ -8,6 +8,7 @@
 #include "line/cursor.h"
 #include "line/getter.h"
 #include "history.h"
+#include "signal_handler.h"
 
 using namespace std;
 
@@ -57,6 +58,8 @@ void enable_raw()
 
     atexit(disable_raw);
 
+    Signal(SIGWINCH, sigwinch_handler);
+
     // TCSAFLUSH
     // the change shall occur after all output written to fildes is transmitted
     // and all input so far received but not read shall be discarded before the change is made
diff --git a/src/signal/sigwinch_handler.cc b/src/signal/sigwinch_handler.cc
new file mode 100644
index 0000000..4b692ed
--- /dev/null
+++ b/src/signal/sigwinch_handler.cc
@@ -0,0 +1,13 @@
+#include "signal_handler.h"
+
+#include "line/getter.h"
+
+namespace ov4
+{
+
+void sigwinch_handler([[maybe_unused]] int sig)
+{
+    windows_size_changed = true;
+}
+
+}
\ No newline at end of file